package com.sky.controller.user;

import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;
import java.util.concurrent.TimeUnit;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "C端-菜品浏览接口")
public class DishController {

    private final DishService dishService;

    private final RedisTemplate<String, List<DishVO>> redisTemplate;

    @Autowired
    public DishController(DishService dishService, RedisTemplate<String, List<DishVO>> redisTemplate) {
        this.dishService = dishService;
        this.redisTemplate = redisTemplate;
    }

    /**
     * 根据分类id查询菜品
     *
     * @param categoryId 分类id
     * @return 菜品列表
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(Long categoryId) {
        String key = "dish_" + categoryId;

        // 先判断redis中是否有数据
         List<DishVO> dishVOS = redisTemplate.opsForValue().get(key);

        // 如果有数据，则直接返回
        if (dishVOS == null || dishVOS.isEmpty()) {
            // 如果没有数据，则查询数据库
            Dish dish = new Dish();
            dish.setCategoryId(categoryId);
            dish.setStatus(StatusConstant.ENABLE);//查询起售中的菜品
            // 查询菜品
            dishVOS = dishService.selectDishByCategoryId(dish);
            // 将数据存入redis
            redisTemplate.opsForValue().set(key, dishVOS);
            // 设置过期时间
            redisTemplate.expire(key, 60 * 30, TimeUnit.SECONDS);
        }
        return Result.success(dishVOS);
    }

}
